virtio-vga / virtio-gpu is a paravirtual 3D graphics driver based on virgl. Currently a work in progress, supporting only very recent (>= 4.4) Linux guests with mesa (>=11.2) compiled with the option --with-gallium-drivers=virgl.

To enable 3D acceleration on the guest system select this vga with -vga virtio and enable the opengl context in the display device with -display sdl,gl=on or -display gtk,gl=on for the sdl and gtk display output respectively."